Bug 20695 – Inspector should display Array lengths in the property lists

• Status: RESOLVED
• Resolution: FIXED
• Component: Web Inspector (Deprecated)

[Oliver Hunt]

When looking at arrays in the scope pane their contents are sorted lexically rather than numerically.  Would also be helpful to have length info presented early.

[Joseph Pecoraro]

The array sorting was fixed in:
https://bugs.webkit.org/show_bug.cgi?id=27329

However, listing the "length" doesn't currently happen.  Is this still wanted?

[Timothy Hatcher]

I think we should show length, but not mixed with the number properties. But as a number next to the object name. We could/should do this for anythign with a length I think, so NodeLists, etc.

So it would look like this:

forBar: Array (2)
   0: "def"
   1: "abc"


Or:

myElement: HTMLDivElement
  childNodes: NodeList (2)
     0: HTMLDivElement
     1: HTMLDivElement
      ...

[Brian Weinstein]

Do we show the name anymore? This would be straightforward, but with some tests I'm not sure the best place to put it:

> a
[5, 4, 3, 2, 3, 3, 3]

Should it look something like:

> a
Length: 5 [5, 4, 3, 2, 3, 3, 3]

or

> a
5 Items [5, 4, 3, 2, 3, 3, 3]

I'm just not sure the best way to put this in the UI, now that we don't explicitly state Array - however, we could do that.

[Timothy Hatcher]

For property lists we still show the name (Array), or we should.

So my proposal would still stand: Array (2), etc.

You are thinking of logging. I don't think we need to show the lenght when logging an array like you did. Only if you do: dir(a) would we show what I mention and what this bug is about.

[Jessie Berlin]

Created attachment 48729 [details]
Add lengths to the description of Arrays, NodeLists, and HTMLCollections in the Inspector property lists

[Brian Weinstein]

(In reply to comment #5)
> Created an attachment (id=48729) [details]
> Add lengths to the description of Arrays, NodeLists, and HTMLCollections in the
> Inspector property lists

There arensome inspector layout tests that can test the console output (and output of console.dir). Does this break any tests/could this be tested?

[Jessie Berlin]

Comment on attachment 48729 [details]
Add lengths to the description of Arrays, NodeLists, and HTMLCollections in the Inspector property lists

I need to make sure that the length doesn't get appended to the description in the console as well.

[Timothy Hatcher]

I think length in console would be useful.

[Jessie Berlin]

Created attachment 48731 [details]
Add lengths to the description of Arrays, NodeLists, and HTMLCollections in the Inspector property lists (and not in the console as well)

[Jessie Berlin]

(In reply to comment #8)
> I think length in console would be useful.

Same format as in the properties list?

[Timothy Hatcher]

I guess  we don't have a good place in the console to show it. Nevermind for now.

[Timothy Hatcher]

Comment on attachment 48731 [details]
Add lengths to the description of Arrays, NodeLists, and HTMLCollections in the Inspector property lists (and not in the console as well)

> diff --git a/WebCore/ChangeLog b/WebCore/ChangeLog

> +    if (result.type == "array")

Use ===.


> +        if (this.property.value.propertyLength !== undefined)

Should be: typeof this.property.value.propertyLength !== "undefined"

[Jessie Berlin]

Created attachment 48738 [details]
Add lengths to the description of Arrays, NodeLists, and HTMLCollections in the Inspector property lists (Fixed issues cited in comments)

[Jessie Berlin]

Thanks for the review!

Committed in r54856: http://trac.webkit.org/changeset/54856